A047761 a(n) = A047760(2n+1).

0, 1, 1, 3, 5, 12, 23, 55, 114, 273, 588, 1428, 3156, 7752, 17427, 43263, 98516, 246675, 567281, 1430715, 3316521, 8414640, 19633796, 50067108, 117464424, 300830572, 709098696, 1822766520, 4313876888, 11124755664, 26421284043

Offset

0,4

Links

Table of n, a(n) for n=0..30.

L. W. Beineke and R. E. Pippert, Enumerating dissectable polyhedra by their automorphism groups, Canad. J. Math., 26 (1974), 50-67.

S. J. Cyvin, Jianji Wang, J. Brunvoll, Shiming Cao, Ying Li, B. N. Cyvin, and Yugang Wang, Staggered conformers of alkanes: complete solution of the enumeration problem, J. Molec. Struct. 413-414 (1997), 227-239.

Formula

a(2n-1) = binomial(3n, n)/(2n+1) = A001764(n).

Crossrefs

Sequence in context: A131322 A224747 A036657 * A349055 A026786 A027246

Adjacent sequences: A047758 A047759 A047760 * A047762 A047763 A047764

Keyword

nonn

Author

N. J. A. Sloane

Status

approved